Nick Proschwitz's first half goal enough to give Brentford all three points in Cardiff.
Brentford won their second successive Under-21 league match at Cardiff City, with a big part owed to Jack Bonham’s goalkeeping in the second half.
The 21-year-old goalkeeper ensured Brentford would chalk up their first three points away from home this season with a superb display.
The small band of spectators, who preferred near freezing temperatures than a night watching the Transfer Window countdown on television, were served up a competitive affair, with Brentford edging things with a first half Nick Proschwitz goal.
He and Alan McCormack returned from injury with Marcos Tebar given a run out to maintain match fitness.
In defence, Rafael Calvet and Gradi Milenge were Brentford’s centre back partnership with Aaron Greene and McCormack on either flank, in front of Jack Bonham in goal.
Tebar sat just in front of the back four, with captain Udumaga and Josh Laurent completing the midfield.
Nick Proschwitz played an advanced role up front, aided by Josh Clarke and Courtney Senior either side of him.
Fifth minute, Theo Wharton’s tame shot was shepherded away by McCormack.
Three minutes later, Brentford posed their first threat, Senior’s shot from the edge of the box parried to safety by Charlie Horton in the City goal.
Proschwitz went close in the 12th minute with The Bees controlling things, and they took the lead seven minutes later through the German.
Josh Laurent played the ball through down the left that split the City defence; Proshwitz coolly slotting past Horton with the outside of his foot.
The half continued with plenty of Brentford possession but McCormack headed smartly away to safety just past the half hour mark with Macauley Southam poised.
Courtney Senior tried another shot from long range before the break, the ball fizzing narrowly wide.
After the switch around, Bonham pushed away a shot but the next quarter of the game passed without a shot of note from either side.
Senior provided Horton with a moment of concern just past the hour mark but his shot was wide.
The hosts spurned a great opportunity to equalise on the 64th minute, Bonham superbly pushing a Ben Watkins shot onto the post, which Southam
Bonham again proved to be equal to the task two minutes later, getting his finger tips at the last second to a David Tutonda rocket from outside the box.
It was Brentford’s turn to respond shortly after, Laurent heading wide from a Greene left-wing cross.
Bonham again came to team mates rescue towards the latter stages, parrying a Tyler Roche shot.
Brentford: Jack Bonham; Alan McCormack (sub Bradley Clayton 76 mins), Gradi Milenge, Raphaël Calvet, Aaron Greene; Josh Laurent, Jermaine Udumaga, Marcos Tebar, Josh Clarke, Courtney Senior (sub Kyjuon Marsh-Brown 90 mins), Nick Proschwitz
Subs (not used): James Ferry, Seth Owen
Cardiff City: Charlie Horton; Jazzi Barnum-Bobb, Kane Owen (sub David Tutonda 54 mins), Tom James, Maximiliano Amondarain, Ben Watkins, Declan John, Theo Wharton (sub Chris Watkins 75 mins), Danny Johnson (sub Tyler Roche 46 mins), Macauley Southam, Gethyn Hill.
Subs (not used): Joe Massaro, Anthony Bell